In North America we’ve given up on this safety aspect and just ticket the vehicle owner with no ability to assign liability (or points) to the actually guilty driver.
Having driven in places where some roads are dotted with cameras and others are bare, the driving behavior is clearly altered. With cameras present, most drivers don't speed. Others speed just below the ticket threshold (+5mph?), or speed only between the cameras. On the roads without cameras drivers are often 10-15mph over the limit with some even faster.
I'm also not crazy about it from a privacy perspective.
Like motor vehicle deaths? In 2022 there were 42,795 such deaths in the US. Meanwhile there were only 22,941 murders in 2021.
However I'd rather the full cause of those deaths were broken down. How many were _just_ someone driving fast? Many drivers do go faster than the recommended / suggested speed, without incident, every day in many places. Surely most of those instances involve some other factor. Maybe it's drugs or alcohol, maybe it's mechanical failure or a medical condition, maybe it's criminal intent to harm. They are rare but I can think of two or three somewhat recent national news stories that involve someone crazy using their vehicle as a weapon on sidewalks or against crowds.
It certainly would be a safety device if you were seen traveling effectively +20 mph over 15/20/30 minutes along a highway.. proves a willful negligence to traffic laws while leaving unharmed those that go 15 over to skirt by an 18 wheeler that is fish-tailing.
They do in the UK.
But OTOH I'd like to get the cops entirely out of the business of enforcing traffic laws and doing stops entirely. Make all traffic enforcement automated and legalize all drugs. Make the cops go find something else to do with their time.
Here in the UK they are clearly signposted so you can slow down before you get to it.
If you don't slow down because you're going too fast or aren't paying attention then you're behaving dangerously and need discouraging. They genuinely improve safety imo.
I would feel much safer if the majority of police resources were allocated to the 'worst' violations of the laws (hardest crimes) first.